xnu-1228.12.14.tar.gz

[apple/xnu.git] / bsd / sys / event.h

diff --git a/bsd/sys/event.h b/bsd/sys/event.h
index 7f98a7d001345141d1fd57cee4e4a7406afff5d9..d08051ca20b47f241188e9b92065270f2b87eddb 100644 (file)
--- a/bsd/sys/event.h
+++ b/bsd/sys/event.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003-2005 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2003-2006 Apple Computer, Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
@@ -118,6 +118,7 @@ struct user_kevent {
 #define EV_DELETE      0x0002          /* delete event from kq */
 #define EV_ENABLE      0x0004          /* enable event */
 #define EV_DISABLE     0x0008          /* disable event (not reported) */
+#define EV_RECEIPT     0x0040          /* force EV_ERROR on success, data == 0 */
 
 /* flags */
 #define EV_ONESHOT     0x0010          /* only report one occurrence */
@@ -172,12 +173,20 @@ struct user_kevent {
 
 /*
  * data/hint fflags for EVFILT_PROC, shared with userspace
+ *
+ * Please note that EVFILT_PROC and EVFILT_SIGNAL share the same knote list
+ * that hangs off the proc structure. They also both play games with the hint
+ * passed to KNOTE(). If NOTE_SIGNAL is passed as a hint, then the lower bits
+ * of the hint contain the signal. IF NOTE_FORK is passed, then the lower bits
+ * contain the PID of the child.
  */
 #define        NOTE_EXIT       0x80000000              /* process exited */
 #define        NOTE_FORK       0x40000000              /* process forked */
 #define        NOTE_EXEC       0x20000000              /* process exec'd */
-#define        NOTE_PCTRLMASK  0xf0000000              /* mask for hint bits */
-#define        NOTE_PDATAMASK  0x000fffff              /* mask for pid */
+#define        NOTE_REAP       0x10000000              /* process reaped */
+#define        NOTE_SIGNAL     0x08000000              /* shared with EVFILT_SIGNAL */
+#define        NOTE_PDATAMASK  0x000fffff              /* mask for pid/signal */
+#define        NOTE_PCTRLMASK  (~NOTE_PDATAMASK)
 
 /*
  * data/hint fflags for EVFILT_TIMER, shared with userspace.
@@ -192,6 +201,10 @@ struct user_kevent {
 #define NOTE_ABSOLUTE  0x00000008              /* absolute timeout        */
                                                /* ... implicit EV_ONESHOT */
  
+/*
+ * DEPRECATED!!!!!!!!!
+ * NOTE_TRACK, NOTE_TRACKERR, and NOTE_CHILD are no longer supported as of 10.5
+ */
 /* additional flags for EVFILT_PROC */
 #define        NOTE_TRACK      0x00000001              /* follow across forks */
 #define        NOTE_TRACKERR   0x00000002              /* could not track child */
@@ -215,12 +228,6 @@ SLIST_HEAD(klist, knote);
 MALLOC_DECLARE(M_KQUEUE);
 #endif
 
-/*
- * Flag indicating hint is a signal.  Used by EVFILT_SIGNAL, and also
- * shared by EVFILT_PROC  (all knotes attached to p->p_klist)
- */
-#define NOTE_SIGNAL    0x08000000
-
 TAILQ_HEAD(kqtailq, knote);    /* a list of "queued" events */
 
 struct knote {
@@ -267,6 +274,7 @@ struct filterops {
 struct proc;
 
 SLIST_HEAD(klist, knote);
+extern void    knote_init(void) __attribute__((section("__TEXT, initcode")));
 extern void    klist_init(struct klist *list);
 
 #define KNOTE(list, hint)      knote(list, hint)